Project Brass 2402H

[MatthiasA]

Hello Everyone!

today i saw some brass pics of 2402H
i want make it by myself with a CNC machine

i found this pic's but there are no dimensions about the 2 pieces..
has anybody exact dimensions about the 2402?

greetings Matthias

[John W]

I have a couple of these parts sitting around that I am not using. I could loan them to you. But, it might make more sense to purchase a complete 2402 and then you would have both the aluminum model and the driver to test your new brass horns with once they are finished.

[MatthiasA]

thats a good idea but the 2402 are very expensive...
do you sell yours ?

greetings Matthias

[John W]

Actually I am using the drivers for my wood horn 3-way. I don't want to loose the original horns just yet.
PM me if you want to borrow just the parts shown in brass.

[Uncle Paul]

The Technical Manual has an engineering drawing that may give you some of the dimensions you need:

http://jblproservice.com/pdf/Discret...dels/2402H.pdf

[Mr. Widget]

thats a good idea but the 2402 are very expensive...
do you sell yours ?

I bet you can get a pair of oxidized ugly 2402s or 075s cheaper off eBay and have them plated for less than the price of 4 large slugs of machine grade brass.

Of course, if you want to have bragging rights about having made them yourself... that's a different story.

Widget

[MatthiasA]

Hello!

thanks a lot for your offer John!
but Today i bought one 2402 driver without the 2 Horn pieces for 25 Euros
(without a diaphragma)
and one complete 2402 without dia for 45 Euro

i will make brass horn pieces!
if anyone wants the same! please PM me

Greetings Matthias Asselborn

[rek50]

Is the "Brass Section-Orchestra" solid brass or brass plated ?

[Marty]

Why do they call them RING RADIATORS ? What is the diaphragm like ?

[MatthiasA]

solid brass

[Mr. Widget]

Why do they call them RING RADIATORS ? What is the diaphragm like ?

Here is a photo that Rob posted a while back. The blue ring is the diaphragm's mounting frame. The actual diaphragm is the aluminum ring that is around the clear phase plug. The voice coil is on the other side. The diaphragms for the 075, 076, and 077 all look virtually identical. Depending on the year of manufacture the thicker aluminum mounting frame can be blue, silver, gold, and perhaps other colors as well.

Widget

[rek50]

"solid brass", That's what I thought. I didn't think you would go through the extra effort for "Looks" although they would look very nice. A "CNC" job?

[Mr. Widget]

If it isn't "just for looks" then why do it?

Changing the material of the horn certainly won't take the first plot and turn it into the second plot.

Widget

[MatthiasA]

here's a pic of the diaphragm
i think it would be a cnc job

[johnaec]

Changing the material of the horn certainly won't take the first plot and turn it into the second plot.

And what exactly IS that second plot, Widget??

John